<?php
/**
* @version $Id$
* @package utf8
* @subpackage strings
*/

//---------------------------------------------------------------
/**
* UTF-8 aware substr_replace.
* Note: requires utf8_substr to be loaded
* @see http://www.php.net/substr_replace
* @see utf8_strlen
* @see utf8_substr
*/
function utf8_substr_replace($str, $repl, $start , $length = NULL ) {
	preg_match_all('/./us', $str, $ar);
	preg_match_all('/./us', $repl, $rar);
	if( $length === NULL ) {
		$length = utf8_strlen($str);
	}
	array_splice( $ar[0], $start, $length, $rar[0] );
	return join('',$ar[0]);
}